Grade AH36, DH36, EH36 material are high strength structural steel, commonly used in hull construction, offshore, & marine engineering. For the high strength shipbuilding plates like grade AH36, DH36, EH36 steel plate, they have been widely used in high stress areas of ships, comparing with general strength steel, they are offering the same strength with the smaller thickness.
Materials
Grade AH36, DH36, EH36 material for hull constrction in carbon and alloy steel, compatible with high strength, low temperature and high heat input soldering. Grades: A, B, D, E, AH32/36/40, DH32/36/40, EH32/36/40.
Shipbuiding Standards from Different Countries
shipbuilding steel plates are produced under the approval of production methods of classification societies in different countries refers to offshore and marine steels.
ABS (American Bureau of Shipping)
BV (Bureau Veritas)
CCS (China Classification Society)
DNV (Det Norske Veritas)
GL (Germanischer Lloyd)
HR (Hellenic Register of Shipping)
KR (Korean Register of Shipping)
LR (Lloyd's Register of Shipping)
NK (Nippon Kaiji Kyokai)
RINA (Registro Italiano Navale)
RS (India Register of Shipping)
According to its yield strength, shipbuilding plate of can be divided into below grades:
Grade A steel is the impact force subjected to normal temperature (20 ° C).
Grade B steel impact force at 0 °C.
Grade D steel impact force at -20 °C.
Grade E steel impact force at -40 °C.
High-strength shipbuilding steel plate can be further divided into: AH32, DH32, EH32; AH36, DH36, EH36 and AH40, DH40, EH40.
1. The general grades A, B, D, and E are distinguished according to the impact temperature of the steel. The impact values of all grades of steel are the same.
2. High-intensity hull structure steel preheating requirements: For all AH, DH, EH plate thickness greater than 30mm angle, butt joints, shall be preheating to 120 ~ 150 °C before welding.
3. For thickness of the plate ≤ 30mm, the ambient temperature is below 5 ° C, preheated to 75 ° C; Ambient temperature below 0 ° C, preheated to 75 ~ 100 ° C.
